Add format to int_generator tests.

CMakeLists.txt

@@ -40,12 +40,18 @@ if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/gtest/CMakeLists.txt)
   add_test(format_test format_test)
 endif ()
 
-if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/tinyformat/tinyformat_test.cpp)
-  find_package(Boost)
-  if (Boost_FOUND)
-    add_definitions(-DHAVE_BOOST)
+find_package(Boost)
+if (Boost_FOUND)
+  add_executable(int_generator tests/int_generator.cpp)
+  target_link_libraries(int_generator format)
+  find_library(HAVE_RT rt)
+  if (HAVE_RT)
+    target_link_libraries(int_generator rt)
   endif ()
+  add_definitions(-DHAVE_BOOST)
+endif ()
 
+if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/tinyformat/tinyformat_test.cpp)
   add_executable(tinyformat_speed_test tinyformat/tinyformat_test.cpp)
   target_link_libraries(tinyformat_speed_test format)
   set_target_properties(tinyformat_speed_test PROPERTIES COMPILE_DEFINITIONS

format.h

@@ -306,6 +306,10 @@ class Formatter {
   // using inserter operator<<.
   internal::ArgInserter operator()(const char *format);
 
+  void operator<<(int value) {
+    FormatInt(value, FormatSpec());
+  }
+
   std::size_t size() const { return buffer_.size(); }
 
   const char *data() const { return &buffer_[0]; }

tests/int_generator.cpp

@@ -10,7 +10,9 @@
 #include <sstream>
 #include <boost/format.hpp>
 
-#include "../high_resolution_timer.hpp"
+#include "high_resolution_timer.hpp"
+
+#include "../format.h"
 
 //  This value specifies, how to unroll the integer string generation loop in 
 //  Karma.
@@ -48,10 +50,10 @@ int main()
     std::vector<int> v (MAX_ITERATION);
     std::generate(v.begin(), v.end(), random_fill()); // randomly fill the vector
 
-    // test the C libraries ltoa function (the most low level function for
+    // test the C libraries sprintf function (the most low level function for
     // string conversion available)
     {
-        //[karma_int_performance_ltoa
+        //[karma_int_performance_sprintf
         char buffer[65]; // we don't expect more than 64 bytes to be generated here
         //<-
         std::string str;
@@ -59,14 +61,14 @@ int main()
         //->
         for (int i = 0; i < MAX_ITERATION; ++i)
         {
-            ltoa(v[i], buffer, 10);
+            sprintf(buffer, "%d", v[i]);
             //<-
             str = buffer;      // compensate for string ops in other benchmarks
             //->
         }
         //]
 
-        cout << "ltoa:\t\t" << t.elapsed() << " [s]" << flush << endl;
+        cout << "sprintf:\t\t" << t.elapsed() << " [s]" << flush << endl;
     }
 
     // test the iostreams library
@@ -88,7 +90,7 @@ int main()
 
     // test the Boost.Format library
     {
-        //[karma_int_performance_format
+        //[karma_int_performance_boost
         std::string str;
         boost::format int_format("%d");
         //<-
@@ -124,6 +126,25 @@ int main()
         cout << "int_:\t\t" << t.elapsed() << " [s]" << flush << endl;
     }
 
+    // test the format library
+    {
+        std::string str;
+        util::high_resolution_timer t;
+
+        //[karma_int_performance_format
+        for (int i = 0; i < MAX_ITERATION; ++i)
+        {
+            fmt::Formatter format;
+            format << v[i];
+            //<-
+            str = format.c_str();      // compensate for string ops in other benchmarks
+            //->
+        }
+        //]
+
+        cout << "format:\t\t" << t.elapsed() << " [s]" << flush << endl;
+    }
+
     return 0;
 }